JSFiddle - React, Tailwind, and code Playground

HTML

<input  type='text' id='valorInput' name='valor'>

<div id='valor'><b>R$ 1,00</b></div>

JavaScript

$(document).ready(function() {
	$('#valorInput').on('change', function() {
  	var value = $(this).val();
    $('#valor b').text('R$ '+value);
  })
})